Septic tank



Patented Oct. 5, 1926.

UNITED STATES PATENT OFFICE.

SEPTIC TAN K.

Application filed February 25, 1926. Serial No. 90,619.

The present invention relates to sewage tanks, particularly for domesticpurposes, though not necessarily limited to such use. The object is toprovide a simple and prao tical structure that can be made up of unitsthat may be duplicates, these units having means of communication, thatare simple and will permit the flow of sewage from one to the other, atthe same time also allowing free venting and thus eliminating the dangerof the collection of gas.

In the accompanying drawings:

Figure 1 is a. horizontal sectional view of the preferred embodiment ofthe invention,

Figure 2 is a side elevation, partly in section, and

Figure 3 is a perspective view of the upper portion of one of the units.

lVhile any number of units may be employed, the present structurediscloses two. These are in the form of containers 3 that are preferablyof concrete. As the units or containers are duplicates, a description ofone will serve for both.

The unit is provided with a generally cylindrical wall, the interiorbeing preferably a true cylinder. It is provided on one side wit-h avertically disposed enlargement 4, having preferably a flat externalsurface 5. Centrally through this portion is formed an opening 6.Channels are located in the fiat surface. These channels have verticalportions 7 on opposite sides of the opening 6, and a transverse portion8 connecting the vertical portions below the opening 6. The

channels may or may not extend below the cross channels 8, though theypreferably do, as shown at 9 in Figure 3. The container furthermore ispreferably provided, diametrically opposite to the opening 6 withanother opening'lO, into which either a supply pipe 11 may extend, orfrom which a delivery pipe, as 12, may lead. The various openings 6 and10 are surrounded at their inner ends by scum check walls 13. Thesewalls are preferably integral with the walls of the container and may beof various con figurations. They terminate short of the top and bottomof the container, and form passageways 14 that are freely openat theirupper and lower ends.

The units or containers are of course separately constructed, and inassembling them into a sewage tank the flat surfaces of two pipe 1.1,flow freely from the first tank into the second, and thence to theoutlet. 12, but that air or gas can pass from one unit to the other overthe upper ends of the scum check walls 13. As a consequence the tank canbe completely vented.

From the foregoing, it is thought that the construction, operation andmany advan tages of the herein described invention will be apparent tothose skilled in the art, without further description, and it will beunderstood that various changes in the size, shape, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

What I claim, is:

1; A sewage tank, comprising a plurality of containers having abuttingsurfaces and alined openings through the surfaces, forming pipelessmeans of communication between the interiors of the chambers, saidsurfaces having alined channels extending around said openings for thereception of a connecting binder.

2. A sewage tank, comprising a plurality of containers having abuttingsurfaces and alined openings through the surfaces, forming means ofcommunication between the in teriors of the chambers, said containershaving interior scum check walls integral with the side walls andextending around the openings, forming-chambers that are freely open attheir tops and bottoms, and said abutting faces having external alinedchannels extending around said openings for the reception of aconnecting binder.

3. sewage tank, comprising a plurality of containers havingsubstantially cylindrical chambers and enlargements'on the outer sidesformed with substantially fiat surfaces, said enlargements having alinedopenings that constitute pipeless means of communication between thechambers, and said surfaces having alined channels around and beneaththe openings for the reception of a connecting binder and packing, andsaid containers having on the inner sides of the enlargements andintegral therewith scum check walls surrounding the openings andterminating short of the tops and bottoms of the containers, formingopen ended passageways to the openings.

In testimony whereof, I afiix my signa ture.

WALTER P. HOOKER.

